﻿//	Copyright (c) 2012 Jonathan Loe
//
//	MIT license (http://en.wikipedia.org/wiki/MIT_License)
//
//	Permission is hereby granted, free of charge, to any person obtaining a copy
//	of this software and associated documentation files (the "Software"), to deal
//	in the Software without restriction, including without limitation the rights 
//	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
//	of the Software, and to permit persons to whom the Software is furnished to do so, 
//	subject to the following conditions:
//
//	The above copyright notice and this permission notice shall be included in all 
//	copies or substantial portions of the Software.
//
//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
//	INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
//	PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
//	FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
//	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Data.Linq;
using System.Text;

using Ordinaire.Data;
using Ordinaire.Db;

namespace Ordinaire
{
    /// <summary>
    /// Represents the base of a data class. It is assumed that every data has a name.
    /// </summary>
    /// <typeparam name="TId">type of unique identifier</typeparam>
    /// <typeparam name="TWho">type of creator and updator</typeparam>
    public abstract class Data<TId, TWho> : Entity<TId>, IAudit<TWho>
    {
        #region Variables

        /// <summary>
        /// Retained Created Date
        /// </summary>
        private DateTime? createDate = default(DateTime);

        /// <summary>
        /// Retained Update Date
        /// </summary>
        private DateTime? updateDate = default(DateTime);

        #endregion

        #region Inherited interfaces

        /// <summary>
        /// Get or set the username who created this entry.
        /// </summary>
        public virtual TWho CreatedBy { get; set; }

        /// <summary>
        /// Get or set the date when the entry was first created.
        /// </summary>
        public virtual DateTime? CreateDate
        {
            get { return (createDate.HasValue && createDate.Value.Ticks > 0) ? createDate : DateTime.Now; }
            set { createDate = value; }
        }

        /// <summary>
        /// Get or set the username who last updated this entry.
        /// </summary>
        public virtual TWho UpdatedBy { get; set; }

        /// <summary>
        /// Get or set the date when the entry was last updated.
        /// </summary>
        public virtual DateTime? UpdateDate
        {
            get { return (updateDate.HasValue && updateDate.Value.Ticks > 0) ? updateDate : null; }
            set { updateDate = value; }
        }

        #endregion
    }
}
